Abstract
A carbon-matrix composite with continuous carbon-fibers was found to be an excellent electromagnetic interference (EMI) shielding material with shielding effectiveness 124 dB, low surface impedance and high reflectivity in the frequency range from 0.3 MHz to 1.5 GHz. The shielding effectiveness of polymer-matrix composites with continuous carbon-fibers was less and that of polymer-matrix composites with discontinuous fillers was even less. The addition of 2.9 vol.% discontinuous 0.1 μm diameter carbon-filaments between the layers of conventional 7 μm diameter continuous carbon-fibers in a composite degraded the shielding effectiveness. The dominant mechanism of EMI for both carbon-matrix and polymer-matrix continuous carbon-fiber composites is reflection.
| Original language | English |
|---|---|
| Pages (from-to) | 227-231 |
| Number of pages | 5 |
| Journal | Composites Part B: Engineering |
| Volume | 30 |
| Issue number | 3 |
| DOIs | |
| State | Published - Apr 1999 |
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